Pump for lubricating systems and the like



Nov. 8, 1932. w, HALLERBERG 1,386,397-

PUMP FOR LUBRICATING SYSTEMS AND THE LIKE Filed May 13, 1929 2Sheets-Sheet l Y 11v VE/VTUR Tfi60i re 3% Walla/"fizzy 61/],

BY I

ATTOR EYcS Nov. 8, 1932. T. w; HALLERBERG PUMP FOR LUBRICATING SYSTEMSAND THE LIKE Filed May 13, 1929 a Wm 2+ m m W w .v 7 a W m M m T m S V 6wrl/ V Patented Nov. 8, 1932 'rnnononn w. HALLERBERG, or BATTLE CREEK,MICHIGAN, ASSIGNOR To LUBRICA- TION DEVICES iuconronernn, or BATTLECREEK, MICHIGAN PUMP FOR- LUBRICATING SYSTEMS AND THE LIKE Applicationfiled May 13,

The main objects of this invention are:

First, to provide a pump for lubricating systems such as motor vehicles,machines having a plurality of bearings, or a plurality of machines,which is automatic in its operation and adapted to automatically stopwhen thepressure in the system has reached a predetermined point.

Second, to provide a pump embodymg these advantages which is compact andcapable of being mounted in a limited space.

Third, to provide a structure having these advantages which iscomparatively simple and not likely to get out of repair.

Objects relating to details and economies of construction and operationof my invention will appear from the description to follow. Theinvention is defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention isillustrated in the accompanying drawings, in which:

Fig. 1 is a fragmentary view mainly in vertical section of a structureembodying the features of my invention, the pump plunger being shown inits initial or retracted position, the control plunger being shown inits actuated position.

Fig. 2 is a fragmentary section on line 2-2 of Fig. 3 of certain partsshown in Fig. 1 with the pump plunger in actuated position and thecontrol plunger in its initial position.

Fig. 3 is a fragmentary section online 33 of Fig. 2.

Fig. 4 is a diagrammatic conventional view of the electro-magnetactuating means and the wiring therefor.

Referring to the drawings, the embodiment illustrated comprises ahousing 1 having a vertical partition 2 therein providing a lubricantreservoir 3 and a housing chamber 4 for the operating mechanism.

The cylinder block designated generally by the numeral 5 has a bore 6constituting a pump cylinder, the bore 7 constituting a contrel,cylinder. The pump cylinder has a dis charge 8 provided with a checkvalve 9. Italso is provided with an inlet passage 10 opening to the sideof the cylinder and com- 1929. Serial No. 362,541.

municating with the reservoir 3. Thispassage is provided with a checkvalve 11.

A relief passage 12 is formed in this cylinder block, this reliefpassage opening to the discharge 8 at the rear of the valve 9 and havinga portion 13 opening transversely through the cylinder 6 andcommunicating with the reservoir. v

The control cylinder is connected to the relief passage 12 by an inletpassage 14 controlled by the pressure actuated valve 15,-th e.

valve being held normally in closed position by means of the coiledspring 16.

The control cylinder is provided with an outwardly opening unloadingvalve 17 discharging to the relief passage 12. The pump plunger 18 isadapted to consti tut'e a valve for the relief passage, this passagebeing opened when the valve is in its fully retracted position, as shownin Fig. 1,

so that the system may discharge back into I the reservoir through thepassage 12 and the control cylinder may discharge into this passagethrough its unloading valve 17.

The initial movement of the pump plunger larged end into the path of theplunger, the

stroke of the plunger is limited as described. When the control lever isshifted to its initial position, as shown in Fig. 1, the stop iswithdrawn, allowing the plunger to return to relief passage openingposition. A coiled spring 23 is provided for holding the lever in bothits inoperative and operative positions. The plunger is provided with areturn spring 24.

In the embodiment illustrated, the structure is actuated by anelectromagnet, the armature 25 of which is mounted on the plunger, thecoil 26 being suitably supported in operative relation thereto. Acontrol rod I ratus, switch 36 is first momentarily closed,

causing the plunger rod to be moved, as described below, out of the pathof the shouldered part of block 22, permitting the latter to be moved bycontrol rod 34 and lever 19 into the path of'the plunger rod before itsreturn stroke. Starting switch 36 is provided primarily for setting theapparatus in operation, inasmuch as when the control rod 34: is pulledto actuate the control lever 19 switch 33 is closed. In the meantime,starting switch 36, having performed its function, is

released and returns to its normally open position. The closing of thecircuit through switch 33 or 36- energizes both the field and the corethrough the contact 28 which moves the core coil to the center of thefield core, operating the plunger 18 and, at the same time, pulling downthe switch core 29 toward the field coil. This results. because the core29 is a laminated iron core and tends to move down toward the end of thefield coil 26. The core 29 is carried by a spring 27.

During this downward movement, the contact 28 is maintained in operativerelation until the core 29 strikes the top of the field core 26, whenthe contact 28 is broken deenergizing the field coil and the core coil.The spring 24 then returns the. switch core until contact 28 is againmade when the operation is repeated, This upward and downward strokecontinues until the system is loaded, when the switch 33 is openedthrough the actuation of the plunger 31 in the cylinder 7.

The plunger 31 is provided with a rod portion 32 projecting intoposition to engage the control member 19 when the control plunger isactuated, thereby withdrawing the stop member 22 and allowing theplunger to return to its relief passage relieving position. The controlmember is operatively connected to the main switch 33 as described, sothat this switch is opened and the pump stopped.

As soon as the pressure is relieved in the relief passage, the spring 34will return-the control plunger to its initial position, forcing thelubricant out of the control cylinder through its unloading valve. Theplunger is very rapidly operated and even with a relatively smallelectromagnet the lubricant may be discharged under very considerablepressure.

found highly satisfactory. I have not attempted to illustrate ordescribe certain embodiments and adaptations which I contemplate as itis believed that this disclosure will enable those skilled in the art toembody or adapt my improvements as may be desired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is: p g p '1. In a pump, the combination witha res- .ervoir, of a pumpcylinder provided with an valve and to saidpump cylinder at. the front of its inlet, a control cylinder, an inletcon necting said relief passage to said control cylinder and providedwith a pressure actuated valve, an unloading valve for said con trolcylinder delivering to said relief pas-.

sage in advance of'it's opening to said pump cylinder, a pump plungerconstituting a valve for said relief passage, a return, spring for saidpump plunger, an electro-magnet for actuating said pump plunger, anautomatically operatingswitch for said electromagnet, a manuallyactuated control memher, a stop operatively connected with said '7 5 edposition to limit the return stroke of said Y pump plunger and therebyclose said relief control member and adapted when in actuatassa e saidrelief assa 'e beinmo en when said pump plunger is in its fullyretracted position, a pressure actuated control plungwe er arranged insaid control cylinder and.

adapted when actuated tov return said conpassage delivering to saidreservoir and v 110.

opening to said discharge passage at the rear of its said valve and tosaid pump cylinder at the front of its inlet, a control cylinder, aninlet connecting said relief passage to said control cylinder andprovided with a pressure actuated valve, an unloading valve forsaidcontrol cylinder delivermg tosaid relief passage in advance of itsopening to saidpump cylinder, a pump plunger constituting a valve forsaid relief passage, a return spring for said pump plunger, anelectro-magnet for actuating said pump plunger, an automaticallyoperating switch for said electro-magnet, a con trol means including astop adapted when 1n actuated position to limit the return stroke ofsaid pump plunger and thereby close said relief passage, said reliefpassage being open e trol member to inoperative position, and a,

III

when said pump plunger is in its fully retracted position, a pressureactuated con-.

trol plunger arranged in said control cylinder and adapted when actuatedto return said control means to inoperative position, and a returnspring for said control plunger.

3. In a pump, the combination with a reservoir, of a pump cylinderprovided with an inlet connection to said reservoir and with a valveddischarge, a pressure relief passage delivering to said reservoir andopening to said discharge passage at the rear of its said valve and tosaid pump cylinder at the front of its inlet, a control cylinder, aninlet connecting said relief passage tosaid control cylinder andprovided with a pressure actuated valve an unloading valve for saidcontrol cylinder delivering to said re lief passage in advance of itsopening to said pump cylinder, a pump plunger constituting a valve forsaid relief passage, means for actuating said pump plunger, a manuallyactuated control member, a. stop operatively connected with said controlmember and adapted when in actuated position to limit the return strokeof said pump plunger and thereby close said relief passage, said reliefpassage being open when said pump plunger is in its fully retractedposition, and a. pressure actuated control plunger arranged in saidcontrol cylinder and adapted when actuated to return said control memberto inoperative position.

at. In a pump, the combination with a reservoir, of a pump cylinderprovided with an inlet connection to said reservoir and with a valveddischarge, a pressure relief passage delivering to said reservoir andopening to said discharge passage at the rear of its said valve and tosaid pump cylinder at the front of its inlet, a control cylinder,

7 an inlet connecting said relief passage to said control cylinder andprovided with a pressure actuated valve, an unloading valve for saidcontrol cylinder delivering to said relief passage in advance of itsopening to said pump cylinder, a pump plunger constituting a valve forsaid relief passage, means for actuating said pump plunger, a controlmeans including a stop adapted when in actuated position to limit thereturn stroke of said pump plunger and thereby close said reliefpassage, said relief passage being open when said pump plunger is in itsfully retracted position, and a pressure actuated control plungerarranged in said control cylinder and adapted when actuated to returnsaid control means to inoperative position.

5. In a pump, the combination of a pump cylinder provided with an inletand with a valve discharge, a pressure relief passage opening to saiddischarge at the rear of its valve and to said cylinder at the front ofits inlet, a pump plunger constituting a valve for said relief passage,a return spring for said pump plunger, an electro-magnet for actuatingsaid pump plunger, a switch for said electro-Inagnet actuated by themovement of the pump plunger, a control means including a stop adaptedwhen in actuated position to limit the return stroke of said pumpplunger and thereby close said relief passage, said relief passage beingopen when said pump plunger is in its fully retracted position, and apressure actuating means operatively connected to the discharge of thepump for returning said stop to its initial position and thereby permitthe plunger to move to relief passage opening position.

6. In a pump, the combination of a pump cylinder provided with an inletand with a valved discharge, a pressure relief passage opening to saiddischarge at the rear of its valve and to said cylinder at the front ofits inlet, a pump plunger constituting a valve for said relief passage,meansfor actuating said pump plunger, a control means including a stopadapted when in actuated position to limit the return of said pumpplunger and thereby close said relief passage, said relief passage beingopen when said pump plunger is in its fully retracted position, and apressure actuating means operatively connected to the discharge of thepump for returning said stop to its initial position and thereby permitthe plunger to move to relief passage opening position.

7. In a pump, the combination of a pump cylinder provided with an inletand with a valved discharge, a pressure relief passage opening to saiddischarge at the rear of said valve and to said cylinder at the front ofits inlet, a pump plunger constituting a valve for said relief passage,a return. spring for said pump plunger, an electro-magnet for actuatingsaid pump plunger, a switch for said electro-magnet actuated by themovement of the pump plunger, and'a control means including a stopadapted when in actuated position to limit the return stroke of saidpump plunger and thereby close said relief passage, said relief passagebeing open when said pump plunger is in its fully retracted position.

8. In a pump, the combination of a pump cylinder provided with a valvedinlet and with a valved discharge, a valve associated with saiddischarge, a pressure relief passage opening to said discharge at therear of said valve and to said cylinder at the front of its inlet, apump plunger constituting a valve for said relief passage, a returnspring for said pump plunger, means for limiting the return stroke ofthe pump plunger thereby maintaining the same in relief passage closingpo sition, pressure actuated means operatively associated with saidstroke limiting means, an

electro-magnet for actuating said pump plunger, and a switch for saidelectro-magnet actuated by the movement of the pump plunger.

9. In a pump, the combination of a cylin-' all) der provided with aninlet and with a valved discharge, a pressure relief passage opening tosaid discharge passage at the rear of its said valve and to said pumpcylinder at the front of its inlet, a pump plunger constituting a valvefor said relief passage, a return spring for said pump lunger, anelectro-magnet for actuating said pump plunger, an automaticallyoperating switch for said electromagnet, and a stop member adapted whenin actuated position to limit the return stroke of said pump plungerthereby maintaining the same in relief passage closing position, saidrelief passage being opened when the pump plunger is in its fullyretracted position. v

10. In apump, the combination of a cylinder provided with an inlet andwith a valved discharge, a pressure relief passage opening to saiddischarge passage at the rear of its said valve and to said pump.cylinder at the front of its inlet, a pump plunger constituting a valvefor said relief passage, a return spring for said pump plunger, meansfor limiting the return stroke of the pump plunger thereby maintainingthe same in relief passage closing position, pressure actuated meansoperatively associated with said stroke limiting means, anelectro-magnet for actuating said pump plunger, and an automaticallyoperating switch for said electro-magnet.

11. In a pump, the combination of a pump cylinder provided with inletand discharge and with a relief means connected to said a pressureactuated element conpump plunger discharge, nected to said relief means,a operatively associated with said relief means, a stop memberoperatively associated with said pump plunger and a 'lai' ted when inactuated position to limit the return stroke of said pump plungerthereby maintaining it in relief closing position, and operatingconnections from said pressure actuated elementto said stop, saidpressure actuating element being provided with an unloading valvedischarging through said relief means. Y

12. In a pump, the combination of a pump cylinder provided with inletand discharge and with a relief means connected to said discharge, apressure actuated element connected to said relief means, a pump plungeroperatively associated with said relief means, a stop member operativelyassociated with said pump plunger and adapted when in actuated positionto limit the return stroke of said pump plunger therebv maintaining itin relief closing position, and operating connections from said pressureactuated element to said stop.

18. In a pump, the combination of a pump cylinder and coacting plunger,said cylinder being provided with an inlet and discharge and with arelief passage connected to said discharge and controlled by the pumpplung-l er, and a control means for said pump plung er including apressure controlled element operatively connected to the discharge, saidpressure controlled element being also provided with an unloading valvecontrolled by said pump plunger.

1%. In a pump, the combination of a pump cylinder and coat-ling plunger,said cylinder being provided with an inlet and discharge and with arelief passage connected to said discharge and controlled by the pumpplunger, and control means for said pump plunger including a pressurecontrolled element operatively connected to the discharge.

In witness whereof I have hereunto set my hand.

' THEODORE 'VV. HALLERBERG.

